Finding the Third Proportional to 67,082 and 90,780

Step by Step Solution

1. Step 1: Write the proportion equation
   67,082 : 90,780 = 90,780 : x
2. Step 2: Convert to fraction form
   67,082/90,780 = 90,780/x
3. Step 3: Cross multiply
   67,082x = 90,780 × 90,780
4. Step 4: Simplify right side
   67,082x = 8,241,008,400
5. Step 5: Solve for x
   x = 8,241,008,400/67,082
6. Step 6: Final answer
   x = 122,849.77